NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

LEWISTOWN prefixes in area code 573

NANPA records 3 assigned NXX blocks to rate center LEWISTOWN in area code 573, 0.4% of the 786 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 3 holders hold those blocks, the largest being MARK TWAIN COMMUNICATIONS (1), ONVOY, LLC - MO (1), BRIGHTSPEED OF EAST MISSOURI, LLC (1). 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 223, 309, 406, 717 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 573
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
573-215 MARK TWAIN COMMUNICATIONS – no yes
573-490 Onvoy ONVOY, LLC - MO – yes yes
573-497 Brightspeed BRIGHTSPEED OF EAST MISSOURI, LLC – yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
MARK TWAIN COMMUNICATIONS – 1 33.3%
ONVOY, LLC - MO Onvoy 1 33.3%
BRIGHTSPEED OF EAST MISSOURI, LLC Brightspeed 1 33.3%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to LEWISTOWN in area code 573?

3 blocks: 215, 490, 497. The table above gives the holder of each.

Which carriers have numbers in LEWISTOWN?

MARK TWAIN COMMUNICATIONS (1 block), ONVOY, LLC - MO (1 block), BRIGHTSPEED OF EAST MISSOURI, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LEWISTOWN a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 573

All 786 prefixes in 573